Phobos' gravity field and its influence on its orbit and physical librations

Details Phobos' gravity field and its influence on its orbit and physical librations Phobos' gravity field and its influence on its orbit and physical librations

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..235b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. 235-251.

Astronomy and Astrophysics

Astrophysics

20

Eccentric Orbits, Gravitational Fields, Librational Motion, Orbital Elements, Phobos, Planetary Orbits, Celestial Mechanics, Gravitational Effects, Moments Of Inertia

Scientific paper

A model describing the physical libration in longitude and latitude for Phobos is derived. The major effect is the well-known longitude variation with the anomalistic orbital period and amplitude. Several additional meter-sized periodic librations in longitude exist. The latitude variation is dominated by the forced precession of Phobos' figure axis with the precession of Phobos' orbital plane. The contribution of Phobos' topography to its gravity field is estimated using the control network model of Duxbury and Callahan (1989).

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